Spent time today preparing the aircraft for an engine run tomorrow. Installed the top engine cowl, checked oil, coolant, fully charged battery, burped the engine and fuel sample from each tank. This will be the first engine run at the airport with wings, cabin doors, top engine cowl and empennage installed. I'm deciding whether to install the spinner for this engine run, tomorrow will tell. It will be a big day tomorrow when I taxi the aircraft under it's own power for the first time.